This study provides new insight into the oxidation of polyolefinic monoterpenes and the dependence of hydrocarbon structure on the formation and yields of organic nitrates (ON) and secondary organic aerosol (SOA). Here we have elucidated the ON, hydroxy nitrate, and SOA yields from the NO3
oxidation of γ-terpinene, a potentially relevant nighttime ON precursor in the Midwestern U.S. The results advance our understanding of the chemistry that influences NOx
production, and aerosol formation.